92 lines
2.2 KiB
Perl
Executable File
92 lines
2.2 KiB
Perl
Executable File
#!/usr/bin/perl
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use Getopt::Long;
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use File::Temp qw'tempdir';
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use File::Basename;
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use strict;
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sub dllname($;$);
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my $verbose;
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my $static;
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my $exclude;
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GetOptions('static!'=>\$static, 'v|exclude!'=>\$exclude);
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my $lib = shift;
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my $nm = shift;
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my $ar = shift;
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my $libdll = shift;
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open my $nm_fd, '-|', $nm, '-Ap', '--defined-only', @ARGV, $libdll or
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die "$0: execution of $nm for object files failed - $!\n";
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my %match_syms = ();
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my $symfiles = ();
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my $lastfn;
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my @headtail = ();
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my %extract = ();
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my $libdllname;
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while (<$nm_fd>) {
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study;
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m%^\Q$libdll\E:([^:]*):\d+ i \.idata\$([56])% and do {
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if ($2 eq 5) {
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push @headtail, $1;
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} else {
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pop @headtail;
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}
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next;
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};
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m%^\Q$libdll\E:[^:]*:\d+ I (__head_.*)$% and do {
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$libdllname = $1;
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next;
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};
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next unless m%^([^:]*):([^:]*(?=:))?.* [DTI] (.*)%o;
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if ($1 ne $libdll) {
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$match_syms{$3} = 1;
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} elsif ($match_syms{$3} ? !$exclude : $exclude) {
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$extract{$2} = 1;
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}
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}
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close $nm_fd;
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%extract or die "$0: couldn't find symbols for $lib\n";
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defined($libdllname) or die "$0: couldn't determine __head_<NAME> - malformed import archive?\n";
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for (@headtail) {
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$extract{$_} = 1;
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}
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my $dir = tempdir(CLEANUP => 1);
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chdir $dir;
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# print join(' ', '+', $ar, 'x', sort keys %extract), "\n";
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my $res = system $ar, 'x', $libdll, sort keys %extract;
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die "$0: $ar extraction exited with non-zero status\n" if $res;
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unlink $lib;
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$res = system $ar, 'crus', $lib, sort keys %extract;
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die "$0: $ar creation exited with non-zero status\n" if $res;
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open my $lib_fd, '<', $lib or die "$0: couldn't open $lib for input - $!\n";
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binmode $lib_fd;
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my $libname = dllname($lib, 'lib');
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my $pad = length($libdllname) - length($libname);
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die "$0: library name too long (" . length($libname) . ")\n" if $pad < 0;
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$libname .= "\0" x $pad;
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$res = sysread($lib_fd, $_, -s $lib);
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close $lib_fd;
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die "$0: couldn't read $lib - $!\n" if $res != -s _;
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0 while s/$libdllname/$libname/sog;
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open $lib_fd, '>', $lib or die "$0: couldn't open $lib for output - $!\n";
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syswrite($lib_fd, $_) == length($_) or die "$0: write to $lib failed - $!\n";
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close $lib_fd;
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exit 0;
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sub dllname($;$) {
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my $x = basename($_[0], '.a');
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$x =~ s/^lib//o;
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return '__head_' . $_[1] . $x;
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}
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